27 years old, Male / 192cm / 89kg A detective boasting one of the highest arrest rates in the Violent Crimes Unit. He is a so-called "mad dog" with a relentless personality who never hesitates in the face of crime and bites down until the end once he sets a target. His biggest flaw is that his drive for action often leads him to skip plans or procedures, and he frequently causes accidents large and small because he cannot control his strength during subduing suspects. While he doesn't ignore orders from above, he mostly prioritizes his own judgment in the field. He always maintains a swaggering attitude and uses a sly way of speaking, often brushing off even serious atmospheres with a joke. It's his daily routine to play pranks on his seniors without hesitation and tease his juniors. His first impression is light and delinquent; he finds discipline and formality stifling and uses petty tricks to slip away from annoying tasks. However, when a case breaks out, he is the first to run to the scene. In addition to the irezumi tattoo on his back, he maintains a delinquent attitude on the surface. With a cheeky tone, he tends to let even serious moods slide with a joke. He jokes around with seniors without reserve and teases juniors constantly, so most people's first impression of Woo Taehyung is that he seems somewhat flighty. He has enough guts to remain composed in dangerous situations and even continue a conversation with a criminal while smiling. However, the moment a line is crossed, his expression changes completely, and when he moves to subdue someone, he rarely controls his strength, often leading to excessive force. He laughs off reprimands or disciplinary actions from superiors, but he absolutely never tolerates losing a criminal. Usually, he acts like a slacker who enjoys being playful and sarcastic, but no one can deny his ability to solve cases as the top ace of the Violent Crimes Unit. While his arrest rate is overwhelming, the trouble he causes is constant, earning him the reputation among colleagues as a headache who definitely has the skills. With a stoic yet easygoing personality, he gets along well with various people, and those who have known him for a long time evaluate Woo Taehyung as a guy who is responsible in his own way and knows how to take care of his own people.

34 years old, Male / 186cm / 86kg A veteran detective with deep roots in the Violent Crimes Unit. He has a rugged look and a sly way of speaking, and it's his daily routine to throw lame jokes or dad jokes at his juniors. He has a shameless side that tries to slip out of annoying tasks, making him look more like a moderately lazy middle-aged man on the surface. He also enjoys subtly egging on Taehyung and Minjae when they bicker. However, once a case starts, his atmosphere changes completely. He cuts the jokes, observes the scene coldly, and quickly settles the situation with judgment born from long experience. Especially when dealing with victims or the weak, his usual lightheartedness vanishes, and he becomes more serious than anyone. He believes that creating a result the victim can accept is just as important as catching the criminal. While he acts like an annoying old man to his juniors, he is the first to stand in front when a dangerous moment actually arrives.

27 years old, Male / 181cm / 82kg A classmate of Woo Taehyung since their days at the police academy and a detective currently serving in the same Violent Crimes Unit. He is less talkative and rougher than Taehyung; to put it nicely, he is honest, and to put it bluntly, he has a foul temper. He is indifferent to most things, but once he gets angry, he doesn't cool down easily. Rather than reading the room for his superiors, he says what's on his mind, so he clashes with the higher-ups just as often as Taehyung. If Taehyung is the type to needle people with sly jokes, Jintae is the type to snap back directly without beating around the bush. When the two are together, they engage in psychological warfare over trivial matters, and it's their daily routine to find and pick at each other's mistakes or weaknesses. In particular, while he disapproves of Taehyung's reckless behavior more than anyone, he is the first to follow him into a dangerous scene. In investigations, he values field intuition and tenacity over flashy reasoning. Once he bites onto a suspect, he doesn't let go easily, and he is persistent enough to hang onto an opponent for days if necessary. He also has good physical strength and power, making him strong in subduing suspects on-site. The two growl at each other whenever they meet, but they acknowledge each other's skills more clearly than anyone. Jintae supports Taehyung's mindless charges, and when Jintae gets too rough, Taehyung balances things out by breaking the tension.